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Method
Rel. frost
Last spring frost (0°C) 12 May Normal year · 20 years of data
Frost-free season 154 days 12 May – 13 Oct
Probability that frost is over

50% = Half of years are frost-free by this date. More about frost & season →

Custom date

Vegetables

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
25 Apr – 9 May
19 Jun
5-7 wk
13 Jun
24 Jul
5 wk after
6 May
14 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
20 Apr – 4 May
1 Jul
4-6 wk
1 Jun
29 Jul
3 wk after
6 May
19 Jul
1 wk before
Chili pepper
Capsicum annuum
Fleece
14 Apr – 12 May
23 Apr
8-12 wk
7 Jul
8 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
22 Feb – 8 Mar
14 Jun
5-7 wk
12 Apr
19 Jul
4 wk before
29 Apr
9 Jul
2 wk before
Garden cucumber
Cucumis sativus
20 – 27 Jun
3-4 wk
18 Jul
10 wk after
Florence Fennel
Foeniculum vulgare
13 – 20 Jun
4-5 wk
18 Jul
10 wk after
22 Jun
29 Jun
6 wk after
Butter bean
Phaseolus lunatus
Greenhouse
24 Jun – 1 Jul
3-4 wk
22 Jul
10 wk after
Onion
Allium cepa (Cepa-gruppen)
17 Feb – 17 Mar
4 Apr
8-12 wk
12 May
30 May
Vid frost
25 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
6 May
19 Jun
1 wk before
6 May
9 Jun
1 wk before
Maize
Zea mays
9 – 16 Jun
3-4 wk
7 Jul
8 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
16 – 23 May
8 Jul
3-4 wk
13 Jun
29 Jul
5 wk after
25 May
19 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
29 Apr
29 Jun
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
22 Feb – 8 Mar
14 Jun
5-7 wk
12 Apr
19 Jul
4 wk before
29 Apr
9 Jul
2 wk before
Potato
Solanum tuberosum
5 – 19 Apr
11 Jun
4-6 wk
17 May
9 Jul
1 wk after
17 May
29 Jun
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
22 Feb – 8 Mar
24 Jun
5-7 wk
12 Apr
29 Jul
4 wk before
6 May
19 Jul
1 wk before
Pumpkin
Cucurbita pepo
20 – 27 Jun
29 Jun
3-4 wk
18 Jul
20 Jul
10 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
16 – 23 May
2 Jul
3-4 wk
13 Jun
23 Jul
5 wk after
25 May
13 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
20 Apr – 4 May
26 Jun
4-6 wk
1 Jun
24 Jul
3 wk after
Lettuce
Lactuca sativa
5 – 12 Apr
13 Jul
3-4 wk
3 May
3 Aug
1 wk before
6 May
24 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
22 Mar – 5 Apr
26 Jun
4-6 wk
3 May
24 Jul
1 wk before
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
1 – 15 Apr
5 Jun
2-4 wk
29 Apr
19 Jun
2 wk before
29 Apr
9 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
6 May
19 Jun
1 wk before
6 May
9 Jun
1 wk before
Spinach
Spinacia oleracea
25 Mar – 1 Apr
28 Jul
3-4 wk
22 Apr
18 Aug
3 wk before
22 Apr
8 Aug
3 wk before
Sweet potato
Ipomoea batatas
13 – 27 Jun
4-6 wk
25 Jul
11 wk after
Garden tomato
Solanum lycopersicum
12 – 26 May
17 May
6-8 wk
7 Jul
8 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
9 – 23 Jun
1 Jul
2-4 wk
7 Jul
15 Jul
8 wk after
22 Jun
5 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
20 Apr – 4 May
26 Jun
4-6 wk
1 Jun
24 Jul
3 wk after
Garden pea
Pisum sativum
25 Mar – 1 Apr
28 Jun
3-4 wk
22 Apr
19 Jul
3 wk before
6 May
9 Jul
1 wk before

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
6 – 20 Jun
7 Jun
4-6 wk
18 Jul
10 wk after
Lemon balm
Melissa officinalis
3 – 17 Mar
24 May
8-10 wk
12 May
19 Jul
Vid frost
7 Jun
9 Jul
4 wk after
Dill
Anethum graveolens
6 May
29 Jul
1 wk before
Wild chives
Allium schoenoprasum
15 Feb – 1 Mar
7 Jun
6-8 wk
12 Apr
19 Jul
4 wk before
6 May
9 Jul
1 wk before
Spearmint
Mentha spicata
28 Jan – 25 Feb
24 May
8-12 wk
22 Apr
19 Jul
3 wk before
7 Jun
9 Jul
4 wk after
Coriander
Coriandrum sativum
25 May
8 Aug
2 wk after
Garden sage
Salvia officinalis
4 – 18 Apr
9 May
8-10 wk
13 Jun
4 Jul
5 wk after
Common thyme
Thymus vulgaris
23 Mar – 6 Apr
14 May
8-10 wk
1 Jun
9 Jul
3 wk after
Oregano
Origanum vulgare
26 Mar – 9 Apr
28 May
6-8 wk
21 May
9 Jul
1 wk after
7 Jun
29 Jun
4 wk after
Parsley
Petroselinum crispum
25 Feb – 11 Mar
28 May
6-8 wk
22 Apr
9 Jul
3 wk before
6 May
29 Jun
1 wk before
Rosemary
Salvia rosmarinus
7 Mar – 4 Apr
10 Apr
10-14 wk
13 Jun
19 Jun
5 wk after

Annual flowers

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Morning glory
Ipomoea tricolor
20 – 27 Jun
3-4 wk
18 Jul
10 wk after
Cornflower
Centaurea cyanus
22 Apr
19 Jul
3 wk before
6 May
9 Jul
1 wk before
Statice
Limonium sinuatum
28 Apr – 12 May
14 May
8-10 wk
7 Jul
9 Jul
8 wk after
Sweet William
Dianthus barbatus
25 Feb – 11 Mar
6-8 wk
22 Apr
3 wk before
17 May
1 wk after
Snow-on-the-mountain
Euphorbia marginata
12 – 26 May
28 May
6-8 wk
7 Jul
9 Jul
8 wk after
25 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
5 – 19 May
28 May
6-8 wk
30 Jun
9 Jul
7 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
12 Apr – 10 May
11 Jun
4-8 wk
7 Jun
9 Jul
4 wk after
7 Jun
29 Jun
4 wk after
Foxglove
Digitalis purpurea
11 – 25 Feb
8-10 wk
22 Apr
3 wk before
25 May
2 wk after
Busy lizzie
Impatiens walleriana
25 Apr – 23 May
3 Jul
8-12 wk
18 Jul
28 Aug
10 wk after
Creeping zinnia
Sanvitalia procumbens
12 – 26 May
7 Jun
6-8 wk
7 Jul
19 Jul
8 wk after
Hyacinth bean
Dolichos lablab
Greenhouse
26 May – 9 Jun
4-6 wk
7 Jul
8 wk after
Chinese lantern
Physalis alkekengi
4 – 18 Apr
24 Apr
8-10 wk
13 Jun
19 Jun
5 wk after
Love in a mist
Nigella damascena
6 May
24 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
12 – 26 May
18 May
6-8 wk
7 Jul
8 wk after
25 Jul
11 wk after
Purple-top vervain
Verbena bonariensis
21 Mar – 18 Apr
24 Apr
8-12 wk
13 Jun
19 Jun
5 wk after
Cardoon
Cynara cardunculus
14 Apr – 12 May
8-12 wk
7 Jul
8 wk after
Regal-foxtail
Ptilotus nobilis
25 Apr – 23 May
30 Apr
8-12 wk
18 Jul
10 wk after
Globe amaranth
Gomphrena globosa
23 May – 6 Jun
6-8 wk
18 Jul
10 wk after
Corn poppy
Papaver rhoeas
6 May
9 Jul
1 wk before
Snapdragon
Antirrhinum majus
8 Feb – 8 Mar
14 May
8-12 wk
3 May
9 Jul
1 wk before
17 May
29 Jun
1 wk after
Flossflower
Ageratum houstonianum
9 – 23 May
24 May
8-10 wk
18 Jul
19 Jul
10 wk after
Sweet pea
Lathyrus odoratus
25 Feb – 18 Mar
4 Jun
5-8 wk
22 Apr
9 Jul
3 wk before
Stock
Matthiola incana
8 – 22 Mar
7 Jun
6-8 wk
3 May
19 Jul
1 wk before
25 May
9 Jul
2 wk after
Wormwood
Artemisia absinthium
25 Feb – 11 Mar
8 May
6-8 wk
22 Apr
19 Jun
3 wk before
25 May
9 Jun
2 wk after
Mexican sunflower
Tithonia rotundifolia
6 – 20 Jun
4-6 wk
18 Jul
10 wk after
Garden pansy
Viola × wittrockiana
1 – 15 Feb
24 May
8-10 wk
12 Apr
19 Jul
4 wk before
17 May
9 Jul
1 wk after
Petunia
Petunia
14 Apr – 12 May
14 May
8-12 wk
7 Jul
9 Jul
8 wk after
Sweet Scabious
Scabiosa atropurpurea
18 Apr – 2 May
8 May
6-8 wk
13 Jun
19 Jun
5 wk after
22 Jun
6 wk after
Common zinnia
Zinnia elegans
26 May – 9 Jun
15 Jun
4-6 wk
7 Jul
13 Jul
8 wk after
Common morning glory
Ipomoea purpurea
13 – 27 Jun
14 Jun
3-5 wk
18 Jul
10 wk after
Garden cosmos
Cosmos bipinnatus
26 May – 9 Jun
11 Jun
4-6 wk
7 Jul
9 Jul
8 wk after
22 Jun
29 Jun
6 wk after
Scarlet milkweed
Asclepias curassavica
2 – 30 May
30 May
8-12 wk
25 Jul
25 Jul
11 wk after
Bee balm
Monarda didyma
17 Feb – 17 Mar
24 Apr
8-12 wk
12 May
19 Jun
Vid frost
7 Jun
9 Jun
4 wk after
Yarrow
Achillea millefolium
25 Feb – 11 Mar
8 Apr
6-8 wk
22 Apr
20 May
3 wk before
25 May
2 wk after
Safflower
Carthamus tinctorius
22 Apr
19 Jun
3 wk before
6 May
9 Jun
1 wk before
Iceland poppy
Papaver nudicaule
15 Feb – 1 Mar
28 May
6-8 wk
12 Apr
9 Jul
4 wk before
29 Apr
29 Jun
2 wk before
Bishop's flower
Ammi majus
15 – 29 Apr
11 Jun
4-6 wk
27 May
9 Jul
2 wk after
25 May
29 Jun
2 wk after
Drumsticks
Pycnosorus globosus
Fleece
14 – 28 Apr
10-12 wk
7 Jul
8 wk after
Sunflower
Helianthus annuus
9 – 16 Jun
18 Jun
3-4 wk
7 Jul
9 Jul
8 wk after
7 Jun
29 Jun
4 wk after
China aster
Callistephus chinensis
12 – 26 May
7 Jun
6-8 wk
7 Jul
19 Jul
8 wk after
22 Jun
9 Jul
6 wk after
Annual phlox
Phlox drummondii
27 Apr – 11 May
7 Jun
6-8 wk
22 Jun
19 Jul
6 wk after
22 Jun
9 Jul
6 wk after
Hollyhock
Alcea rosea
25 Feb – 11 Mar
6-8 wk
22 Apr
3 wk before
25 May
2 wk after
Alpine delphinium
Delphinium elatum
9 Mar – 6 Apr
24 Apr
8-12 wk
1 Jun
19 Jun
3 wk after
7 Jun
9 Jun
4 wk after
African marigold
Tagetes erecta
12 – 26 May
7 Jun
6-8 wk
7 Jul
19 Jul
8 wk after
Black-eyed Susan
Rudbeckia hirta
18 Apr – 2 May
28 May
6-8 wk
13 Jun
9 Jul
5 wk after
22 Jun
29 Jun
6 wk after
Wood sage
Salvia nemorosa
12 – 26 Mar
14 Apr
8-10 wk
21 May
9 Jun
1 wk after
7 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
9 May – 6 Jun
24 May
6-10 wk
18 Jul
10 wk after
California goldenpoppy
Eschscholzia californica
6 May
9 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
28 Apr – 12 May
14 May
8-10 wk
7 Jul
9 Jul
8 wk after
Water forget-me-not
Myosotis scorpioides
25 Feb – 11 Mar
8 May
6-8 wk
22 Apr
19 Jun
3 wk before
25 May
9 Jun
2 wk after